/Engine/Source/Editor/MaterialEditor/Public/MaterialPropertyHelpers.h
static bool FilterLayerAssets ( const struct [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) & InAssetData, [FMaterialLayersFunctions](API\Runtime\Engine\Materials\FMaterialLayersFunctions) * LayerFunction, EMaterialParameterAssociation MaterialType, int32 Index )